12110211220221 has 12 divisors (see below), whose sum is σ = 17492584646940. Its totient is φ = 8073447687360.

The previous prime is 12110211220171. The next prime is 12110211220229. The reversal of 12110211220221 is 12202211201121.

12110211220221 is a `hidden beast` number, since 1 + 2 + 1 + 10 + 211 + 220 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1816470495225 + 10293740724996 = 1347765^2 + 3208386^2 .

It is not a de Polignac number, because 12110211220221 - 2¹⁵ = 12110211187453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12110211220194 and 12110211220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110211220229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 928041 + ... + 5008161.

It is an arithmetic number, because the mean of its divisors is an integer number (1457715387245).

Almost surely, 2^{12110211220221} is an apocalyptic number.

It is an amenable number.

12110211220221 is a deficient number, since it is larger than the sum of its proper divisors (5382373426719).

12110211220221 is a wasteful number, since it uses less digits than its factorization.

12110211220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4409916 (or 4409913 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12110211220221 its reverse (12202211201121), we get a palindrome (24312422421342).

The spelling of 12110211220221 in words is "twelve trillion, one hundred ten billion, two hundred eleven million, two hundred twenty thousand, two hundred twenty-one".